No shade, but lets be honest here, any composer would prefer his/her songs being performed by the biggest artists, so they usually send the demos to the top ones first. So I'd assume it was sent to literally any big Kpop gg and nobody, fucking nobody saw a potential in it, isn't that crazy?
JYP and SM's song filter seems to be working the opposite way, they filter and keep the shittiest ones and the best ones ended up going to these other ggs